NetBSD/sparc64 supports both 32-bit and 64-bit kernels. A 32-bit kernel runs
all NetBSD/sparc binaries. A 64-bit kernel runs 64-bit binaries, and has
support for running most 32-bit binaries as well, with the exception of some
low level kernel groveling tools. Additionally, NetBSD/sparc64 is able to run
Solaris 64 and 32 bit binaries with emulation. See
compat_netbsd32(8),
compat_solaris(8) and the pkgsrc package emulators/netbsd32_compat16.